106 



COELENTERATA— ANTHOZOA 



PHYLUM II 



circular. Septa numerous ; the six principal septa extending to the centre, 

 the remainder with fused inner edges. Cretaceous and Tertiary. 



Bendrophi/Uia Blv. (Fig. 167). Corallum 

 branching, increasing by lateral gemmation. 

 Calices oval ; septa numerous and slender, those 

 of the last cycle extending to the spongy 

 columella, and fused with the converging ends 

 of shorter septa of preceding 

 cycle. Tertiary and Recent. 



Lohopsammia, Stereopsammia 

 Edw. and H. Eocene. Astroides 

 E. and H. (Fig. 97). Recent. 



Family 3. Poritidae Dana. 



Composite coralla composed of 

 porous sderenchyma. Corallites 

 small ; septa as a rule only moder- 

 Fi<:. 167. ately numerous, sometimes repre- 



Dendrophyllla elegant Duncan. Oligocene ; Brockenhurst, seilted hy TOWS of tfabeculae Or 



caliieTeniai^^?'""''"'' ""'"''"^ '''' ' '' ^'''"''■'''' '''''°" °' lajueUae. Tluca absent. 



Subfamily A. Spongiomorphinae Freeh. 



Corallum composed of thick trabeculae and strengthened by horizontal synapticulae. 

 Calices very imperfectly differentiated from coenenchyma, and loithout distinct septa. 

 Dissepiments usually sparsely developed. 



Of the genera belonging to this subfamily, Spongiomorpha, Heptasfylis and 

 Stromal omorj)ha Freeh, are found in the Alpine Trias (Rhaetic and Zlambach 

 beds). These are all tuberous, composite coralla of extremely irregular form. 

 In Spongiomorpha and Heptastylis, six septa are indicated by somewhat regularly 

 disposed columns of trabeculae ; and in the latter form these are bound 

 together by synapticulae which are projected at equal altitudes, and form 

 perforated horizontal storeys. In 

 Stromatomorpha no radial arrange- 

 ment of the trabecular septa exists. 



Falaeacis E. and H. (SpJienopo- 

 terium Meek and AVorth.), occurring 

 in the Lower Carboniferous limestone 

 of North America and Scotland, per- 

 haps also belongs here. 





'>v 



Subfamily B. Poritinae Milne Ed- 

 wards and Haime. 



Sep)ta not very numerous, well developed. 

 Corallites united by their porous walls. 



169). 



Fig. 16S. 



Adinacis de'jans Reuss. 

 Valley, Salzkammergut. a 

 h, Transverse section, enlarged ; 

 enlarged (after Eeuss). 



Upper Cretaceous ; Gosan 



Upper surface, natural size ; 



Longitudinal section, 



Litharaea E. and H. (Fi 



Massive coralla. Calices sub-polygonal, 

 septa generally in three cycles ; columella spongy. Eocene and Miocene. 



Rhodaraea E. and H. Massive coralla. Spurious walls of corallites thick ; 

 pali prominent. Miocene and Recent. 



